Befriend him. Pop culture is just an act. Mature him by being White around him. He'll catch on quick once he recognizes your behaviour. I'll bet his blood will reawaken when it realizes that it doesn't need to shell up under popular assimilation.

I would approach him and ask, "Hey! I am curious, where is your family from? Originally?" That is one way I do it. Question his heritage in an earnest fashion. Don't be condescending or harsh, be friendly and ignore his idiotic pop-culture acting.

"I ain't knows man!" might be an answer you get, so what is next? That route seems dead no? Well, exercise your own heritage to make him possibly relate. "Well, I am mostly British, or Anglo, in origins. Don't you think it would be nice to know where your family is from? What it has done? You might even be the great grandson of a Prince or King for all you know!" That route often does die if the kid is apathetic to the most disgusting degree.

Another alternative is to ask him about his family, his parents, and his interests. Befriend him and try to lead him away from that lifestyle. Introduce him to friends of yours who would not be outwardly "offensive" to his soft little mind. Instead, lead him as he has been led so far. Slowly showing him that he is White and has his own culture to identify with, not that of a Race far, far, far, if not totally removed from his in all ways.

Remind him that depravity is not a good way to live, remind him of crime and relate it to his mother, sister, or girlfriend. Violent crime can often shock people into being open, even if they were pulling an ostrich maneuver just moments before. They need to take thier heads out of the sand (or often other places more southerly located on thier own bodies) and start listening to fact and reason that they are not Black, but White and have a distinct and proud heritage.

Of course, this does not always work. Nothing is a 100% guarantee to get them to tear back that wool they have had on thier eyes since birth. In fact, you might find more just close down when you actually confront them with thier own whiteness. Such is the facts of this current sociological situation. We need to let it go though, because in the end, as I have said, it is the few loyal members of our Race who will come in with the strength and vivacity to revive the American way of life - the White way of life and resume a proper lifestyle not based on Liberal Jewish and non-White ideals.

Just try and if you fail, do not feel guilty or bad. We will win them all over in the long run.

All the above is good advise, be a non judgemental friend at first. He's probably doing this for shock value and EXPECTS a negative response. Show him by example that there is value in being White. That pride in ones race doesn't mean necessarily hating anyone else.
I've had my best results in dealing with these kinds of people when I just let them see me as a rational man, who came to his beliefs through truth and will stand up and defend those beliefs.

All the above is good advise, be a non judgemental friend at first. He's probably doing this for shock value and EXPECTS a negative response. Show him by example that there is value in being White. That pride in ones race doesn't mean necessarily hating anyone else.
I've had my best results in dealing with these kinds of people when I just let them see me as a rational man, who came to his beliefs through truth and will stand up and defend those beliefs.

I would go about this fairly slow and subtle. dont rush right into talking about our race's struggle, Just be friendly. work up a relationship. either he'll take on or he wont. or if you just decide he's a lost cause, call him a punk, they dont like that one much.
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When i was in the Army i learn't alot about young men when i spent two years as a training corporal teaching new recruits.
After about six weeks alot of the recruits would start to imitate the NCO's, copying their mannerisms and behaving in a more professional manner.

This young man is lost in the sense that he craves a positive White role model but cannot find one in the modern "White Popular culture" so he opts to mimic the "culture enrichers" who have a more machistic image that is usually portrayed through rap music.
To show him the error of his ways you need to be a "hero" to him:-

By showing courteousy to women, children and the elderly.
By being studious (you don't need to be a wannabe rocket scientist but you need to try hard)
By being sober and promoting fitness.
By being smartly turned out(polished boots/shoes not trainers and ironed shirt/trousers and no baseball caps and sunglasses).
By being patriotic.
And by being articulate especially when replying to the "culture enrichers" who he will quickly see to be less educated when the simian replies with such rap/hollywoodistic retorts that they have in their limited armoury.

By showing him that being White is the coolist, most intelligent and most cultured group he will not need to be "indocturined" because he will see it for himself.